How does frequency affect KVA rating of a transformer?
If a 500 kva, 500 to 250 v, 60 hz t/f normally used in Canada is to be operated in Europe on 50 hz
frequency then how will its KVA rating change?
a-increase
b-decrease
c-remains same

How does frequency affect KVA rating of a transformer? If a 500 kva, 500 to 250 v, 60 hz t/f normal..

The transformer EMF equation shows that the EMF induced in the secondary or the primary side of a transformer is directly proportional to the product of the flux (Φm) through the transformer core and the frequency. This leads to the flux is proportional to E/f.
For example, the kVA rating of the 500v to 250v 60 Hz transformer will be smaller when used in Europe with a frequency of 50Hz.
500/60 = E/50 E is smaller than 500v on primary side.
250/60 = E/50, E is smaller than 250v on secondary side.

 Is This Answer Correct ? 0 Yes 0 No

More Electrical Engineering Interview Questions

can we conduct the swineburne's test on a dc series motor? why?

Please clarify 1. Icw: rated short circuit working withstand capacity 2. Icu: Rated ultimate breaking capacity 3. Ics: Rated service short circut withstand capacity 4. other specification of ACB

Can anybody tell the formula to calculate temparature rise in the cable with respect to current?

explain the existence of reactive power in electrical engg?when it generates?

In EB metering we face problem kva jump even in no load condition.can any one help to control this

please send 5yearje solved papers on my email himmatsinghnathawat@gmail.com

Why we use d.c. meger in a.c. induction motor?

how to find number of run for transformer & alternator secondary side? give the example.

what is droop?

what are safety seals in HT line?

Is there any specialised book to refer about fault level calculation both in MV and LV side??

how will calculate the winding ohmic value in 3phase motors in h.p wise? ex.10 h.p motor winding value ph to ph ? 5 h.p motor any calculation please send me.

Categories
• Civil Engineering (5085)
• Mechanical Engineering (4451)
• Electrical Engineering (16632)
• Electronics Communications (3918)
• Chemical Engineering (1095)
• Aeronautical Engineering (239)
• Bio Engineering (96)
• Metallurgy (361)
• Industrial Engineering (259)
• Instrumentation (3014)
• Automobile Engineering (332)
• Mechatronics Engineering (97)
• Marine Engineering (124)
• Power Plant Engineering (172)
• Textile Engineering (575)
• Production Engineering (25)
• Satellite Systems Engineering (106)
• Engineering AllOther (1379)